Fertility Friend and Fertility Monitor disagree?

[gojulieogo]

33419

According to my fertility monitor, I had my first Peak Day on day 12, which I believe should mean I ovulate on Day 13 (which also came up as Peak). However, Fertility Friend thinks I ovulated on day 14. What do you guys think?

[atomic sagebrush]

FF is just an algorithm and I think that one early high temp confused it. I would go with fertility monitor on this one.